升级Vue3，iView替换ElementPlus

- 删除babel配置、更新依赖与入口初始化
- 全量替换UI组件、样式适配，新增迁移文档与标签/过滤器自动化替换脚本

im/package.json

@@ -12,29 +12,29 @@
     "node": ">=16"
   },
   "dependencies": {
-    "@element-plus/icons-vue": "^2.3.1",
-    "axios": "^0.21.4",
+    "@element-plus/icons-vue": "^2.3.2",
+    "axios": "^1.7.9",
     "babel-plugin-prismjs": "^2.0.1",
-    "core-js": "^3.36.0",
-    "element-plus": "^2.6.3",
+    "core-js": "^3.49.0",
+    "element-plus": "^2.14.1",
     "js-audio-recorder": "^1.0.6",
     "js-base64": "^2.5.1",
     "nprogress": "^0.2.0",
     "prismjs": "^1.29.0",
     "qs": "^6.9.4",
     "svg-sprite-loader": "^5.0.0",
-    "vue": "^3.4.21",
+    "vue": "^3.5.35",
     "vue-cropper": "^1.1.1",
     "vue-prism-editor": "2.0.0-alpha.2",
-    "vue-router": "^4.3.0",
+    "vue-router": "^4.6.4",
     "vue-virtual-scroller": "^3.0.4",
     "vuex": "^4.1.0"
   },
   "devDependencies": {
-    "@vue/cli-plugin-babel": "^5.0.8",
-    "@vue/cli-plugin-eslint": "^5.0.8",
-    "@vue/cli-service": "^5.0.8",
-    "@vue/compiler-sfc": "^3.4.21",
+    "@vue/cli-plugin-babel": "^5.0.9",
+    "@vue/cli-plugin-eslint": "^5.0.9",
+    "@vue/cli-service": "^5.0.9",
+    "@vue/compiler-sfc": "^3.5.35",
     "babel-eslint": "^10.1.0",
     "compression-webpack-plugin": "^10.0.0",
     "eslint": "^8.28.0",